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Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Aug. 31, 2012	Aug. 31, 2012	Aug. 31, 2011
Fair Value Measurements
Total losses	$ 7,500	$ 7,507
Property, plant and equipment, net	46,642	46,642	51,804
Nonrecurring basis
Fair Value Measurements
Total losses		7,507
Nonrecurring basis | Before Fair Value Adjustment
Fair Value Measurements
Property, plant and equipment, net	54,000	54,000
Nonrecurring basis | Total
Fair Value Measurements
Property, plant and equipment	46,450	46,450
Nonrecurring basis | Significant unobservable inputs (Level 3)
Fair Value Measurements
Property, plant and equipment	$ 46,450	$ 46,450

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software, net of accumulated depreciation.

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Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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